To “complement” something means to complete it, either by providing something that was missing, or by providing an additional element that makes something better. In this case, then, we might imagine that the fruitiness of the wine enhanced the flavors of the strawberries, or that the strawberries were so sweet that the dryness of the wine provided a pleasing balance. Remember when using the word “complement” – spelled C-O-M-P-L-*E*-M-E-N-T – that you are not thinking of the word “compliment” – spelled C-O-M-P-L-*I*-M-E-N-T – which means saying something nice to someone.
Example: “Sarah is pleased at the compliments she’s getting about how well her flower arrangements complement the linens on the tables.”